Yes really. Keto still follows calories in/out. Low carb diets are just a way of restricting calories without counting them. People naturally restrict calories when eating low carb -- this is the sole reason it works. You can eat twinkies and mcdonalds and still lose weight if you eat little enough. You can eat no carbs or sugar and still gain weight if you eat more calories than your body needs.

Every diet that doesn't involve directly counting calories tricks you into restricting them in some way, putting you in a caloric deficit. Period. This is how every diet works.